If I'm going to 3-way sli it, since one review stated that their system reached 800 watt

And I got the parts that where being shipped, it all works (compaired to my last system that had a bad motherboard and took me 2 years to find why it was crashing so much). The quad core seems a little slow at times, but I'm sure that it is because of loading single core programs.

Additionally, I'm running Windows XP Media Center Edition and I'm going to be one of those people that is going to avoid Vista until Windows 7 comes out

I'm impressed what this computer has shown me. It seems to hover around 30% cpu (it a quad core) and 25% ram (out of 4 gigs) usage when I'm running intensive programs on it. The crysis demo runs into problems when I jack up the settings, but that's due to the outdated video card in my computer.